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The first 25 slides, exactly as they appear. The full deck has 54 content slides.
Ophthalmology
Imaging in Neuro ophthalmology
Built from Khurana — Neuro-Ophthalmology
What’s inside
6 sections · 54 slides
Why Imaging Matters
The eye is visible, but its wiring is hidden inside the skull
- The problem imaging solves
- How far imaging has come
- When to order imaging
- The imaging toolbox
Computed Tomography (CT)
Fast X-ray slices — the strength is bone and blood
- What CT is and how it works
- Two generations of CT
- When CT wins over MRI
- CT of the orbits: axial and coronal views
- The downsides of CT
- Iodinated contrast in CT
Magnetic Resonance Imaging (MRI)
A different physics — unmatched soft-tissue detail
- Why MRI is the modality of choice
- Reading the name N-M-R-I
- Relaxation times: T1 and T2
- T1 vs T2 — what looks bright
- Axial MRI of the orbits showing both optic nerves
- Gadolinium contrast MRI
- FLAIR: silencing the water signal
- Fat suppression and diffusion imaging
- The limits of MRI
- CT vs MRI at a glance
Imaging Specific Conditions
Matching the right scan to the clinical question
- Optic nerve disorders
- Multi-sequence MRI of the orbits and optic nerves
- Optic nerve glioma vs meningioma
- Reading the tumor tables
- Contrast MRI through the orbital apex and skull base
- Traumatic optic neuropathy
- Chiasmal compressive lesions
- Coronal contrast MRI of a suprasellar compressive mass
- Cranial nerve palsies and ocular motility
- Axial MRI of the brainstem and posterior fossa
- Carotid-cavernous fistula (CCF)
Neurovascular Imaging
Picturing the blood vessels of eye and brain
- CT angiography vs MR angiography
- MR angiography in detail
- 3D time-of-flight MR angiogram of the circle of Willis
- CT angiogram of the intracranial arteries
- MR venography (MRV)
- MR spectroscopy (MRS)
- Catheter angiography and treatment
- Catheter angiography and endovascular treatment
Conclusion
Getting the most out of imaging
- Guiding principles
- The clinician's responsibility
- Two families of imaging error (Wolintz et al., 2004)
- When imaging and clinic disagree
- Three things to take away
- Why is CT, not MRI, the first choice for acute head trauma with suspected haemorrhage?
- References
- Neuro-Ophthalmology